Charles w



(No Model.) y

C. W. BALDWIN.

HOISTING DBVIGB.

No. 277,403. Patented May- 8,1883.

mll lliuggnlplmflhhmlun ATTORNEYS NA PETERS PMhLHhDSHDM Washingtnn. D. C.

VNNITED STATES PATENT TIFFICE.

i CHARLES W. BALDWIN, OF DENVER, COLORADO, ASSIGNOR TO E. F. ALLEN,

OF SAME PLACE.

HOISTING DEVl-CE.

SPECIFICATION forming part of-Letters :Patent No. 277,408, dated May 8,- 1883.

Application filed September 12,1882. (No model.)

To all whom ttmay concern Beit known that I, GHARLEs W. BALDWIN, of Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Improvement in Elevators for Coal, Ore, Ste., of which the following is a specification.

My invention relates to improvements in elel vators for coal, ore, Ste., in which a windingdrum is used to elevate coal from a vertical shaftby means of. bucket and rope or chain by hand-power; and the objects vof my improvements are, first, to provide means whereby a reciprocating lever motion communicates intermittentrotary motion to the winding-drum in one direction; second, to afford facilities for permitting the drum to unwind freely t0 lower the bucket into the shaft, and to control the descent of the bucket with a brake operating indirectly upon the drum; and, third, to provide means for dumping the coal from the bucket at the point desired.

To this end my invention consists in the construction and combination of parts hereinaf ter fully described andset forth, reference being had to the accompanying drawings, in which- Figure l is a perspective view of my invention in position to begin work. Fig. 2is a de tail plan view, showing the connection between the drum anddrivinggear, a part of the gear being broken away for that purpose.

A represents the vertical shaft leading to the mine.

B is a track framed of light timbers to be moved in any direction about the shaft, and fixed for use by stakes driven beside it into the ground. C C are wheels to run upon said track, supporting my elevator-frame D, the axles of the wheels being journaled in posts of the frame.

E is the drum upon which the rope e is wound, carrying the bucket J.

At each end of drum E is a ratchet-wheel, F, secured to the drum, which receives n10- tion from the beveled-gear wheel G by means of. one or more pawls or -ratchets, f, to revolve only one way, for the purpose of winding up the rope e. The gear-wheels G are free to revolve either way upon the shaft g. Each ratchet may be provided with a spring to keep it in engagement with the teeth of wheel F,

so that the drum E can never revolve backward without carrying both gear-wheels G with it.

H is a gear consisting of two opposite arms, provided at their extremities with circular arcs or segments of gear-teeth to mesh into the two gear-wheels G at once. A vertical oscillating movement of the segment H imparts a similar oscillating4 motion to wheels G, and they in turn communicate this oscillating motion intermittingly to drum E by means of the 'pawls f and ratchet-wheel F; butV the teeth of both wheels F facing the same way, when one wheel, G, is drivingthe drum forward the pawls of the other wheel G are dragging backward over the teeth, and when the onel revolves backward the other imparts forward motion to said drumin asimilar manner. Thus the oscillating motion of segments H produces rotary 'motion in one direction of drum E. SegmentsHare one piece secured upon shaft h to oscillate therewith. Shaft his journaled in a bearing on frame D,andis operated by handY levers L passing through the cross-head K, rigidly fxed thereto. j

b is a grooved edged brake-wheel secured upon the shaft g of drum E.

d is the brake,made of rawhide, tough leather, or some similar exible material, hung -in the groove in the rim of wheel b and secured at both endsto a hand brake-lever, t', which is in turn pivoted to frame D; or one end of the brake cl may be fastened to said lever i and other end fixed to the frame D; or the lever t' may ride directly in the groove. The oiice of this brake is to retard the descent ofthe bucket J when the drum E is set free to revolve backward. To set the drum free, the teeth of segments H must be disengaged from the teeth of wheels G by drawing shaft h longitudinally away from drum E. To do this the hand-lever c, which is pivoted at one end to frame D, is raised at the other end to take it from between the collar c on the shaft and the shaftbearing. Then the drum is free to revolve, and i the descent ot' the bucket must be controlled IOC - ger life, as a brake applied to a flat wheel does.

The duplicated wheels, pawls, and ratchets at opposite ends of the drum, when in connection with segments H, are firmly locked, so that the vload cannot draw the drum backward in any position of the lever L, whether the same be moving or stationary, and, disengaging segments H from wheels Gr, leaves the bucket free to descend, controlled by the brake.

-What I claim as my invention, and wish to secure by Letters Patent, is-

1. The combination, with the drum E, provided with ratchet-wheels F and the gearwheels G and pawlsf, carrying the same, ofthe double segmental gear H, secured upon shaft h, which shaft is journaled in a bearing in the frame D, to oscillate on its axis and to slide endwise, and the lever a, pivoted to the frame to swing between the collar c on the shaft and the bearing, as and for the purpose specified.

2. The segment H, secured upon its shaft h,

said shaft being adapted to oscillate and slide longitudinally in its bearing, and provided with a xed collar, c, in combination with a lever, a, pivoted to frame D, to swing between said collar and the bearing of the shaft, to serve as a shoulder to keep said segment engaged, as specified.

3. The combination, with al winding-drum, rope, bucket, means for operating the sa-me to draw coal from a vertical shaft or mine, and a frame in which the' axle of said drum is journaled, of wheels upon said frame and a track for the wheels to run on, whereby the elevator which lifts the coal from the mine may convey the same to the dump, substantially as specied.

4. The combination, with the coal elevator and conveyer described, of the adjustable section of track N, provided with the trip-bar M, arranged to engage the lower portion of the bucket .T as it iscarried along the track by the elevator, whereby thebucket is tipped to empty the coal upon the dump O, substantially as specified.

The above specification of my invention signed by me in the presence of two subscribing witnesses.

CHARLES W. BALDWIN. 

